BMI Calculator

Calculate your Body Mass Index and find your ideal weight range

About BMI

Body Mass Index (BMI) is a screening tool used to assess whether a person has a healthy body weight for their height. It is calculated by dividing weight in kilograms by height in meters squared.

BMI Categories

CategoryBMI Range
Underweight< 18.5
Normal18.5 – 24.9
Overweight25 – 29.9
Obese≥ 30

About this Calculator

BMI (Body Mass Index) is a simple measure that uses your height and weight to estimate body fat. Our calculator supports both metric (kg/cm) and imperial (lbs/inches) units. While BMI is not a diagnostic tool, it provides a useful screening measure for weight categories that may lead to health problems.

Privacy Note: All calculations are performed locally in your browser. No data is ever sent to a server or third party.

BMI Calculator FAQ

What does BMI actually measure?
BMI estimates body fat from your weight and height (kg/m²). It is a screening tool, not a direct measurement of body composition or overall health.
What is considered a healthy BMI range?
For most adults, a BMI of 18.5–24.9 is considered healthy weight, 25–29.9 overweight, and 30+ obese. Interpretation differs slightly for children, teens, and certain populations.
Is BMI accurate for athletes?
No. BMI does not distinguish between muscle mass and body fat, so highly muscular individuals may register as overweight or obese despite low body-fat percentage.
Does BMI differ by age or gender?
The standard BMI calculation formula is the same for adult men and women, but healthy ranges vary for older adults, children, and during pregnancy.